Bathometer.



I'. H. C. HEYN.

BATHOMETER.

APPLIGATION FILED 11111.16. 1911.

Patented May 14, 1912.

UNITED STATES FRIEDRICH HERMANN CARL HEYN, OF HAMBURG, GERMANY.

BATHOMETER.

Application filed January 16, 1911.

To all whom t may concern Be it known that I, FRIEDRICH HERMANN CARL HEYN, gentleman, German subject, residing at Nos. 5-13 Raboisen, Hamburg, Germany, have invented new and useful Improvements in Bathometers, of which the following is a speeiication.

My invention relates to apparatus, for measuring the depth of water, substantially consisting of a flexible tube to be let down into the water, to the top end of which is attached a manometer and to the bottom end an air-vessel so that, according to the pressure of the air in the tube dependent on the pressure of the water for the time being, the depth of water can be read directly at the manometer.

The essence of my invention is the arrangement in the air-vessel of a pipe or tube projecting upward from just above the center of the bottom in the air-vessel to outside the vessel. This pipe serves, in combination with a duct under the same, for supplying water to the air-vessel. Said duct alone would not suflice for this purpose because,

' as soon as the air-vessel sank into the shallow bottom of the sea, the duct would be stopped up before the air-pressure in the flexible tube had become equal to the waterpressure. rl`he,consequence would be that the measurements of the depths would always be too small. Owing to the pipe arranged in the air-vessel, however, after the duct has been stopped up water can enter the vessel, so that the water-pressure and air-pressure in the flexible tube can always be equalized. An additional purpose of the pipe is to serve as rinsing pipe, when raising the air-vessel, for automatically cleaning the duct. Lastly, I prefer to .make the bottom of the air-vessel which, as a rule, is filled wit-h lead and in which the duct is provided, detachable, e. g. by means of screw-threads or the like. By removing the bottom it is then possible to examine and readily clean the inside of the air-vessel.

One illustrative embodiment of my invention .is represented by way of example in the accompanying drawing, wherein Figure l is a longitudinal sect-ion showing the air-vessel connected to the bottom end of the flexible tube; Fig. 2 shows the general arrangement of my apparatus for use as a manual sounding-apparatus for measuring depths of water; Fig. 3 shows Specification of Letters Patent.

Serial No. 602,765.

the employment of my apparatus as a water# gage for measuring depths of water.

Referring to the drawing, the air-vessel comprises a casing c which is cylindrical as a rule, and to whose bottom end is attached the detachable part e. This bottom part has the duct f. The casing is generally closed air-tightly above by the conical lid or cover f/ having a perforated screw-threaded member for attachment to the flexible tube a. An inlet pipe cl projects from above, preferably through the lid g, into the air-vessel to just above the middle of the bottom e. The pipe d is open above and below and can be lengthened upward as desired, c. g. by connecting with .it a pipe It.

lVhen my apparatus is employed as a watergage for observing` the difference in water level at ebb and How, when varying winds blow or for similar measurements, a support 2 (Fig. 3), which may be constructed of individual stays or in any suitable manner, carries the air-vessel in order that the latter shall not fall over when resting for a long time on the bottom of the sea, because otherwise the air would escape or water would enter into the flexible tube. lVhen employing the apparatus as a watergage the inlet f must be closed by suitable means, when the air-vessel is to restvfor a long time on the sea-bottom, in order that sand or the like may not constantly enter. After the air-vessel has been raised the port must be opened, in order that the water can run out.

As compared with the apparatuses for measuring depths of wate and with manual sounding-apparatuses my new apparatus has, firstly, the advantage that owing to water being able to enter from above and from below into the air-vessel, the latter can lill more rapidly, whereby measurements are made more rapidly which is of very great value when sounding while a ship is sailing, and secondly, the mud entering from the sea-bottom does not obstruct the measurement, because it is automatically removed, so that a special valve, e. g. a lip valve, as closure of the duct is not required. During frosty weather a lip valve or the like can freeze tight or it can be closed so tight that the water cannot run out automatically.

I claim l. In a bathometer the combination of a Patented May 14, 1912.

vessel, an air-oonduit attached thereto, a manometer communicating with sald alr- `condut, a tube passing through the upper end of the said Vessel and terminating above the bottom of the vessel, the vessel bottom havinga duct which forms therethrough a continuation of the said tube, substantially as set forth.

`2. In a bathometer the combination of a vessel, an air-conduit attached thereto, a manometer communicating with said aireonduit, a tube passing through the upper end of the said vessel and extending to a point near the bottom of said vessel, the said bottom being removable and having a duct leading from the lower portion of they said vessel to the interior thereof, substantially as set forth.

In witness whereof I have hereunto signed my name this third day of January 1911 in the presence of two subscribing witnesses.

FRIEDRICH HERMANN CARL HEIN.

Witnesses:

WOLDEMAR HAUPT, HENRY HASPER.

Copies of this patentmay be obtained for ive cents each, by addressing the Commissioner of Patents,

' Washington, D. (1.. 

